The French painter George Seurat used mathematical ideas to structure his compositions. In his painting of musicians outside a circus of around 1888, now in the Metropolitan Museum of Art in New York, he included lots of horizontal and vertical lines. The effect is very calm. You can measure out La parade de cirque to discover the structure.
Seurat did not follow the lines too tightly but still made them show. The centre line goes through the trombone player – down his hat, along the line of the trombone and down his straight leg. The horizontal centre line goes through his waist, across the shoulders of the musicians to the left and along a bright horizontal line on the far right. Many objects or shapes show the golden section lines.